package cn.xzchain.concurrency.atomic;

import cn.xzchain.concurrency.annoations.ThreadSafe;
import lombok.extern.slf4j.Slf4j;

import java.util.concurrent.*;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;

/**
 * @author lihang
 * @date 2018/5/7.
 * @description AtomicLong的使用
 */
@Slf4j
@ThreadSafe
public class Atomic2 {

    /**请求总数*/
    public static int clientTotal = 5000;
    /**同时并发执行的线程数*/
    public static int threadTotal = 200;

    public static AtomicLong count = new AtomicLong(0);

    public static void main(String[] args) throws InterruptedException {
        ExecutorService executorService = new ThreadPoolExecutor(200,200,0L,TimeUnit.SECONDS,new LinkedBlockingQueue<>());
        final Semaphore semaphore = new Semaphore(threadTotal);
        final CountDownLatch countDownLatch = new CountDownLatch(clientTotal);
        for (int i =0;i<clientTotal;i++){
            executorService.execute(() -> {
                try{
                    semaphore.acquire();
                    add();
                    semaphore.release();
                }catch (Exception e){
                    log.error("exception:",e);
                }
                countDownLatch.countDown();
            });
        }
        countDownLatch.await();
        executorService.shutdown();
        log.info("count:{}",count.get());
    }

    private static void add(){
        count.incrementAndGet();
    }
}
